Gleb Natapov <gleb@xxxxxxxxxx> writes:
> On Sun, Mar 24, 2013 at 02:44:26PM +0100, Frederic Weisbecker wrote:
>> 2013/3/21 Gleb Natapov <gleb@xxxxxxxxxx>:
>> > Isn't is simpler for kernel/context_tracking.c to define empty
>> > __guest_enter()/__guest_exit() if !CONFIG_KVM.
>>
>> That doesn't look right. Off-cases are usually handled from the
>> headers, right? So that we avoid iffdeffery ugliness in core code.
> Lets put it in linux/context_tracking.h header then.
Here's a version to do that.
Kevin
>From d9d909394479dd7ff90b7bddb95a564945406719 Mon Sep 17 00:00:00 2001
From: Kevin Hilman <khilman@xxxxxxxxxx>
Date: Mon, 25 Mar 2013 14:12:41 -0700
Subject: [PATCH v2] ontext_tracking: fix !CONFIG_KVM compile: add stub guest
enter/exit
When KVM is not enabled, or not available on a platform, the KVM
headers should not be included. Instead, just define stub
__guest_[enter|exit] functions.
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxx>
---
include/linux/context_tracking.h | 7 +++++++
kernel/context_tracking.c | 1 -
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h
index 365f4a6..9d0f242 100644
--- a/include/linux/context_tracking.h
+++ b/include/linux/context_tracking.h
@@ -3,6 +3,13 @@
#include <linux/sched.h>
#include <linux/percpu.h>
+#if IS_ENABLED(CONFIG_KVM)
+#include <linux/kvm_host.h>
+#else
+#define __guest_enter()
+#define __guest_exit()
+#endif
+
#include <asm/ptrace.h>
struct context_tracking {
diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c
index 65349f0..85bdde1 100644
--- a/kernel/context_tracking.c
+++ b/kernel/context_tracking.c
@@ -15,7 +15,6 @@
*/
#include <linux/context_tracking.h>
-#include <linux/kvm_host.h>
#include <linux/rcupdate.h>
#include <linux/sched.h>
#include <linux/hardirq.h>
--
1.8.2
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